// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef FLUTTER_SHELL_PLATFORM_EMBEDDER_TESTS_EMBEDDER_CONTEXT_H_
#define FLUTTER_SHELL_PLATFORM_EMBEDDER_TESTS_EMBEDDER_CONTEXT_H_

#include <map>
#include <memory>
#include <string>
#include <vector>

#include "flutter/fml/closure.h"
#include "flutter/fml/macros.h"
#include "flutter/fml/mapping.h"
#include "flutter/shell/platform/embedder/embedder.h"
#include "flutter/shell/platform/embedder/tests/embedder_test_compositor.h"
#include "flutter/testing/test_dart_native_resolver.h"
#include "flutter/testing/test_gl_surface.h"
#include "third_party/dart/runtime/bin/elf_loader.h"
#include "third_party/skia/include/core/SkImage.h"

namespace flutter {
namespace testing {

using SemanticsNodeCallback = std::function<void(const FlutterSemanticsNode*)>;
using SemanticsActionCallback =
    std::function<void(const FlutterSemanticsCustomAction*)>;

class EmbedderTestContext {
 public:
  EmbedderTestContext(std::string assets_path = "");

  ~EmbedderTestContext();

  const std::string& GetAssetsPath() const;

  const fml::Mapping* GetVMSnapshotData() const;

  const fml::Mapping* GetVMSnapshotInstructions() const;

  const fml::Mapping* GetIsolateSnapshotData() const;

  const fml::Mapping* GetIsolateSnapshotInstructions() const;

  void SetRootSurfaceTransformation(SkMatrix matrix);

  void AddIsolateCreateCallback(fml::closure closure);

  void AddNativeCallback(const char* name, Dart_NativeFunction function);

  void SetSemanticsNodeCallback(
      const SemanticsNodeCallback& update_semantics_node);

  void SetSemanticsCustomActionCallback(
      const SemanticsActionCallback& semantics_custom_action);

  void SetPlatformMessageCallback(
      const std::function<void(const FlutterPlatformMessage*)>& callback);

  EmbedderTestCompositor& GetCompositor();

  using NextSceneCallback = std::function<void(sk_sp<SkImage> image)>;
  void SetNextSceneCallback(const NextSceneCallback& next_scene_callback);

  size_t GetGLSurfacePresentCount() const;

  size_t GetSoftwareSurfacePresentCount() const;

 private:
  // This allows the builder to access the hooks.
  friend class EmbedderConfigBuilder;

  std::string assets_path_;

  // Pieces of the Dart snapshot in ELF form, loaded by Dart's ELF library.
  Dart_LoadedElf* elf_library_handle_ = nullptr;
  std::unique_ptr<fml::Mapping> vm_snapshot_data_;
  std::unique_ptr<fml::Mapping> vm_snapshot_instructions_;
  std::unique_ptr<fml::Mapping> isolate_snapshot_data_;
  std::unique_ptr<fml::Mapping> isolate_snapshot_instructions_;

  std::vector<fml::closure> isolate_create_callbacks_;
  std::shared_ptr<TestDartNativeResolver> native_resolver_;
  SemanticsNodeCallback update_semantics_node_callback_;
  SemanticsActionCallback update_semantics_custom_action_callback_;
  std::function<void(const FlutterPlatformMessage*)> platform_message_callback_;
  std::unique_ptr<TestGLSurface> gl_surface_;
  std::unique_ptr<EmbedderTestCompositor> compositor_;
  NextSceneCallback next_scene_callback_;
  SkMatrix root_surface_transformation_;
  size_t gl_surface_present_count_ = 0;
  size_t software_surface_present_count_ = 0;

  static VoidCallback GetIsolateCreateCallbackHook();

  static FlutterUpdateSemanticsNodeCallback
  GetUpdateSemanticsNodeCallbackHook();

  static FlutterUpdateSemanticsCustomActionCallback
  GetUpdateSemanticsCustomActionCallbackHook();

  void SetupCompositor();

  void FireIsolateCreateCallbacks();

  void SetNativeResolver();

  void SetupOpenGLSurface(SkISize surface_size);

  bool GLMakeCurrent();

  bool GLClearCurrent();

  bool GLPresent();

  uint32_t GLGetFramebuffer();

  bool GLMakeResourceCurrent();

  void* GLGetProcAddress(const char* name);

  FlutterTransformation GetRootSurfaceTransformation();

  void PlatformMessageCallback(const FlutterPlatformMessage* message);

  bool SofwarePresent(sk_sp<SkImage> image);

  void FireRootSurfacePresentCallbackIfPresent(
      const std::function<sk_sp<SkImage>(void)>& image_callback);

  FML_DISALLOW_COPY_AND_ASSIGN(EmbedderTestContext);
};

}  // namespace testing
}  // namespace flutter

#endif  // FLUTTER_SHELL_PLATFORM_EMBEDDER_TESTS_EMBEDDER_CONTEXT_H_